No, but that's a good point -- the bar is low if we're merely testing if the current POTUS has above average cognition relative to the overall population. Trump could have above average intelligence and still be our dumbest President in all the ways that actually matter.
Imma go out on a limb and say he doesn't have above average intelligence, relative to Calvin Coolidge or Calvin Murphy
I think the bigger topic is not so much whether the questions were hard or easy, it's his (already known) pathological inability to not turn everything into a self-congratulatory brag fest.
He really doesn't realize that he's admitting he had a stroke or they think he has dementia ... or both.